The Obama administration has decided to preserve a controversial arrangement by which a single military official is permitted to direct both the National Security Agency and the military’s cyberwarfare command, U.S. officials said.

The decision by President Obama comes amid signs that the White House is not inclined to impose significant new restraints on the NSA’s activities — especially its collection of data on virtually every phone call Americans make — although it is likely to impose additional privacy protection measures.

Some officials, including the top U.S. intelligence official, had argued that the NSA and Cyber Command should be placed under separate leadership to ensure greater accountability and avoid an undue concentration of power.

“Following a thorough interagency review, the administration has decided that keeping the positions of NSA Director and Cyber Command Commander together as one, dual-hatted position is the most effective approach to accomplishing both agencies’ missions,” White House spokeswoman Caitlin Hayden said in an e-mail to The Washington Post.